Lub ntsiab tseem ceeb cuam tshuam rau qhov ua tau zoo ntawm cov cement mortar yog cov dej - cement ratio, uas ncaj qha txiav txim siab nws impermeability, khov -thaw tsis kam, thiab tsis kam mus rau tshuaj corrosion los ntawm kev tswj lub pore qauv ntawm lub mortar.
Tsis tas li ntawd, cov ntsiab lus tseem ceeb hauv qab no tseem cuam tshuam rau lub sijhawm ntev -lub sij hawm durability ntawm mortar:
Dej-cement ratio (cov ntsiab lus tseem ceeb): Cov dej ntau dhau- cement piv ua rau muaj ntau qhov pores tom qab cov dej ntau dhau evaporates, txo qhov ntom ntom thiab ua rau cov mortar muaj kev cuam tshuam ntau dua rau khov -thaw voj voog, dej nkag, thiab tshuaj lom neeg corrosion, yog li ua rau nws cov dur tsis muaj zog. Kev tswj cov dej- cement ratio yog qhov kev ntsuas tseem ceeb los txhim kho cov kav ntev.
Khoom zoo thiab sib tov proportions
Cement zoo: Cov ntxhia muaj pes tsawg leeg thiab corrosion kuj ntawm cov cement ncaj qha cuam tshuam rau cov kav ntev. Piv txwv li, sulfate- cov cement resistant tuaj yeem txhim kho cov tshuaj tiv thaiv corrosion.
Sand av nkos cov ntsiab lus thiab gradation: Cov av nkos siab lossis cov gradation tsis zoo yuav txo cov mortar ntom thiab ua rau muaj kev pheej hmoo ntawm kev tawg.
Kev siv cov khoom sib xyaw: tsim nyog ntxiv cov tshuaj tiv thaiv dej thiab dej -cov tshuaj txo qis tuaj yeem txhim kho impermeability thiab ntom, tab sis cov tshuaj yuav tsum tau tswj.
Construction Process and Density: Uneven mixing, insufficient vibration, or excessive application can easily lead to hollow areas and cracks in the mortar layer, compromising its integrity and accelerating the intrusion of harmful external substances.
Kev Kho Mob (Key Guarantee): Cement hydration yuav tsum muaj qhov chaw ntub dej tsis tu ncua. Kev kho tsis txaus (xws li tsis muaj kev npog lossis dej tsis raws sijhawm) tuaj yeem ua rau lub ntsej muag shrinkage tawg, cuam tshuam rau kev txhim kho lub zog thiab kav ntev. Cov lus qhia tshwj xeeb yuav tsum tau kho dej kom pib ib hnub tom qab kev tsim kho thiab txuas ntxiv mus ntev li xya hnub.
Environmental Effects: Ntev - lub sij hawm raug rau khov - thaw cycles, alternating ntub thiab qhuav tej yam kev mob, tshuaj corrosion (xws li acid los nag thiab ntsev tsuag), los yog carbonization ib puag ncig yuav maj mam ua puas lub mortar qauv. Qhov zoo pib ntom ntom thiab impermeability yog qhov tseem ceeb los tiv thaiv cov kev puas tsuaj no.